US4666074A - Impact nailing and dimpling apparatus - Google Patents

Impact nailing and dimpling apparatus Download PDF

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Publication number
US4666074A
US4666074A US06/787,856 US78785685A US4666074A US 4666074 A US4666074 A US 4666074A US 78785685 A US78785685 A US 78785685A US 4666074 A US4666074 A US 4666074A
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Prior art keywords
compressed air
dimple
piston
moving
bore
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Expired - Fee Related
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US06/787,856
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English (en)
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Donald K. MacDonald
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Individual
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Priority to US06/787,856 priority Critical patent/US4666074A/en
Priority to CA000520477A priority patent/CA1273751A/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C1/00—Hand-held nailing tools; Nail feeding devices
    • B25C1/04—Hand-held nailing tools; Nail feeding devices operated by fluid pressure, e.g. by air pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C1/00—Hand-held nailing tools; Nail feeding devices
    • B25C1/04—Hand-held nailing tools; Nail feeding devices operated by fluid pressure, e.g. by air pressure
    • B25C1/047—Mechanical details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C7/00—Accessories for nailing or stapling tools, e.g. supports

Definitions

  • the present invention relates to apparatus used for installing construction materials in general and to an automatic impact nailing and dimpling apparatus for driving a nail and setting a dimple to a predetermined depth in gypsum wallboard in particular.
  • Gypsum board also called wallboard and drywall, comprises processed gypsum which is sandwiched between sheets of paper.
  • the board is usually provided in standard sheets 4 feet wide by 8 to 14 feet in length, 1/4 to 1" thickness.
  • the board is attached to wooden studs by nailing the board to the studs.
  • the nails used typically comprise a cupped head.
  • a dimple is formed in the wallboard.
  • the dimples thus formed and butt joints between adjacent boards are then taped and covered with a wallboard compound for providing a smooth uniform surface. Thereafter the surface is painted or covered with a plaster for providing an attractive and aesthetically pleasing appearance.
  • a nail is hammered into the wallboard and the stud until the base of the head of the nail is flush with the surface of the wallboard. Thereafter, a single stroke of the hammer using the convex surface of the hammer countersinks the nail and at the same time forms a dimple in the wallboard.
  • a principal disadvantage of the above-described method for installing wallboard is that the head of the nail is struck by the convex surface of the hammer before the convex surface of the hammer contacts the surface of the wallboard. This tends to cause the head of the nail to pierce the paper covering of the wallboard. Also, if the nail is not driven perpendicular to the wallboard, the sharp edge of the head of the nail will tend to pierce the paper covering the wallboard. Once the surface paper covering is pierced, it loses its integrity which reduces the holding ability of the cup headed nail.
  • Still another disadvantage of the above-described method is that it is difficult to set nails and dimples repeatedly at uniform and preferred depths.
  • a piston member and nail set assembly which is pneumatically driven in a single-stroke fashion, a nail feeding mechanism which automatically feeds nails to a position beneath the nail set, a dimpler having a convex exterior surface with a hole centrally located therein which is activated by the piston member for creating a dimple in the wallboard as the nail is being set, and a triggering mechanism to control the operation of the apparatus.
  • the nail is driven through the hole in the dimpler by the piston and when the piston strikes the dimpler, it causes the dimpler to dimple the wallboard.
  • a principal disadvantage of the above-described single-stroke automatic-type nailing and dimpling apparatus is that, in general, there is no means provided in the apparatus for automatically controlling the depth to which a nail and a dimple is set in the wallboard.
  • the air pressure in the apparatus varies or the hardness of the wood studs to which the wallboard is nailed varies, the depth to which each of the nails is driven cannot be accurately controlled. This may result in nails not being driven deep enough or driven too deeply. If the nails are not driven deep enough, they will not be properly countersunk and if the dimpler is not driven deep enough, the paper will not be properly dimpled. Alternatively, if the nails and dimpler are driven too deep this can cause the nails and/or the dimpler to tear the surface paper, causing the nails to lose their holding ability.
  • a principal object of the present invention is an automatic impact nailing and dimpling apparatus comprising means for automatically setting a nail or other fastener and a dimple to a predetermined depth in a gypsum wallboard or other substrate.
  • Another object of the present invention is an apparatus as described above comprising means for controlling the angle at which a nail is hammered into the wallboard such that the angle is substantially perpendicular to the wallboard.
  • an impact nailing and dimpling apparatus In the apparatus there is provided a dimpler and a hammer assembly comprising a movable piston and a nailset which are movably mounted in a housing of the apparatus and a nail feeding mechanism for feeding nails into the apparatus beneath the nailset.
  • a compressed air control valve Located in a compressed air channel in the apparatus between a source of compressed air and the dimpler and the hammer assembly, there is provided a compressed air control valve.
  • the valve is provided for controlling a flow of compressed air from the source to the dimpler and the hammer assembly including the piston. Extending from the dimpler to the valve is a valve control member for controlling the operation of the valve.
  • the apparatus is first connected to a source of compressed air which causes the dimpler and hammer assembly to be automatically retracted into the housing and a nail inserted beneath the nailset.
  • the housing is then placed in contact with a wallboard.
  • the activation of a trigger member then causes the compressed air control valve to be moved to a first position wherein the dimpler and hammer assembly are freed to move and compressed air is channeled to the piston causing the piston to reciprocate and drive the nail and dimpler into the wallboard.
  • the valve control member extending from the dimpler causes the valve to be moved from its first position to a second position wherein the valve interrupts the flow of compressed air to the piston thereby stopping the reciprocal movement of the piston and further movement of the dimpler into the wallboard.
  • a further feature of the present invention is that the housing orientates the nailset and dimpler perpendicular to the wallboard so that the nail is driven perpendicularly into the wallboard.
  • the nailing and dimpling of gypsum wallboard to wooden studs is rendered uniform and repeatable regardless of variations in the density of the wooden studs and in the thickness of the wallboard being attached to the stud. Furthermore, by means of the above-described feature, the uniform and repeatable nailing annd dimpling of the wallboard to wooden studs can be achieved even by relatively inexperienced persons.
  • FIG. 1 is a side elevation view of a dimpling and nailing apparatus according to the present invention
  • FIG. 2 is a bottom view of the apparatus of FIG. 1;
  • FIG. 3 is a top view of the apparatus of FIG. 1;
  • FIG. 4 is a partial cross-sectional view of the apparatus of FIGS. 1-3 taken in the direction of the lines of 4--4 of FIG. 3;
  • FIGS. 5 and 6 are partial cross-sectional views of a compressed air control valve and trigger assembly according to the present invention.
  • FIG. 7 is a partial end view of a valve control member according to the present invention taken along lines 7--7 of FIG. 6;
  • FIGS. 8-10 are partial elevation views of the valve and trigger assembly of FIGS. 5 and 6 showing various positions thereof.
  • FIGS. 11 and 12 are partial cross-sectional views showing the operation of a flutter valve and piston assembly according to the present invention.
  • an impact nailing and dimpling apparatus designated generally as 1.
  • a housing designated generally as 2 comprising a cylindrical hammer and dimple assembly housing 3, a handle 4, a nail receiving compartment 5 fitted with a removable cover 6 and a smooth planar surface on the bottom of the housing 3 and compartment 5, for forming a stabilizing/orientating sole plate or base member 7.
  • Extending downwardly from the handle 4 there is provided the finger-actuated portion of a trigger assembly designated generally as 8.
  • a fitting 9 for coupling the apparatus 1 to a source of compressed air (not shown).
  • FIG. 4 there is movably mounted in a bore centrally located in the housing 3 a cylindrically-shaped dimpler 10 and a cylindrically-shaped hammer assembly 11. Extending beneath the handle 4 there is provided a compressed air control valve assembly 12 and the trigger assembly 8.
  • an open-ended cavity or bore 14 an end wall 15 comprising an exterior convex surface 16 and a sidewall 18 forming the bore 14.
  • a hole 17 Extending outwardly from the top end of the side wall 18 into a recess 13 provided therefor there is provided an annular flange 19.
  • an elongated nail receiving slot 20 On the right side of the dimpler 10 there is provided in the side wall 18, in communication with the nail chamber 5, an elongated nail receiving slot 20. Fitted to the interior of the wall 15 there is provided a resilient pad member 21.
  • an O-ring 22 for providing a compressed air seal between the interior wall of the recess 13 and the flange 19.
  • O-ring 23 is provided for providing another compressed air seal between the wall 18 of the dimpler 10 and an interior wall of the bore in the housing 3. Extending to the right from the dimpler 10 there is provided an L-shaped valve control member 25.
  • a T-shaped section 26 At the top of the member 25 there is provided a T-shaped section 26. Slidably mounted to the upper surface of the section 26 there is provided a block member 27. The block member 27 is slidably connected to the section 26 by means of a dovetail mortise and tendon 28. A leaf spring 29 is attached to and extends from the member 25 for engaging a pin 30 which extends outwardly from the block 27.
  • a cylindrically-shaped hollow housing 40 In the hammer assembly 11 there is provided a cylindrically-shaped hollow housing 40. In the lower end of the housing 40 there is provided a wall 41. Centrally located in the wall 41 in registration with the hole 17 in the dimpler 10 there is provided a nailset 42. Nailset 42 is adjustably threaded into the end wall 41 and extends downwardly therefrom into the hole 17 when the hammer assembly 11 is in its lowest position as shown in FIG. 4. Extending outwardly from the top of the hammer assembly 11 and into a recess 38 provided therefor in the wall of a cavity 39 in the interior of the housing 3 above the bore 14, there is provided an annular flange 43. In the periphery of the flange 43 there is provided an O-ring 44. O-ring 44 is provided for providing a compressed air seal between the hammer assembly 11 and the wall of the recess 38 in the housing 3.
  • a piston member 51 Movably mounted in a bore 50 provided therefor in the housing 40 of the assembly 11 there is provided a piston member 51. Movably mounted in a cavity 52 provided therefor in the upper end of the housing 40 there is provided a flutter valve member 53. Above the valve member 53 there is provided a compressed air manifold 54. Extending from the manifold 54 to the top of the member 53 there is provided a compressed air channel 55. Extending from the manifold 54 to the bottom surface of the member 53 there is provided a compressed air channel 56. Channel 55 is provided to have a larger diameter than channel 56 in order to provide a differential air pressure on the upper and lower surfaces of the member 53 as will be further described below.
  • a compressed air channel 57 Extending from the upper surface of the member 53 to the lower end of the piston 51 in a wall of the housing 40, there is provided a compressed air channel 57. Extending through aother portion of the wall of the housing 40 there is provided a pair of compressed air channels 58 and 59. Extending between the channels 58 and 59 between the housing 40 and the dimpler 10, there is provided a compressed air channel 60. The channels 58 and 59 and 60 are provided to communicate with a compressed air channel 61 which is provided in a wall of the housing 3.
  • an O-ring 62 In a recess provided therefor in the wall of the housing 3 above the channel 61 there is proivded an O-ring 62.
  • the O-ring 62 is provided for providing a compressed air seal between the assembly 11 and the interior wall of the bore 14 in the housing 3.
  • a spring member 63 Located above and in the cavity 39 for providing a relatively light constant spring force on the assembly 11 there is provided a spring member 63.
  • a spool-shaped valve member 70 comprising a pair of disk-shaped end members 71 and 72 which are located on opposite ends of a smaller diameter cylindrically-shaped member 73.
  • a return spring 74 In contact with an exterior wall of the member 71 there is provided a return spring 74.
  • a valve piston member 75 Extending from an exterior wall of the member 72 there is provided a valve piston member 75 which is adapted to be contacted by the member 27.
  • the trigger assembly 8 In contact with the opposite side of the member 27, there is provided the trigger assembly 8.
  • a finger actuating member 81 In the trigger assembly 8 there is provided a finger actuating member 81, a block actuating member 82 and a spring member 83.
  • the member 81 is pivotally attached to the housing 3 by means of a pin 84.
  • the member 82 is pivotally attached to the member 81 by means of a pin 85.
  • a compressed air input channel 90 Extending from the fitting 7 described above with respect to FIG. 1 to the valve assembly 12, there is provided a compressed air input channel 90. Extending from the valve assembly 12 to the upper end of the housing 3 there is proivded a compressed air channel 91. As shown more clearly in FIG. 4, extending from the interior end of the channel 91 to the manifold 54 in the upper end of the hammer assembly 11, there is provided a flexible tubing 92. Extending from the lower side of the valve assembly 12 there is provided a compressed air channel 93. Extending from the upper end of the compressed air channel 93 to the valve assembly 12 there is provided a compressed air channel 94. Extending from the rear of the assembly 12 through the housing 3 there is provided a compressed air channel 95.
  • the compressed air channel 95 extends through the housing 3 and is terminated by a compressed air exhaust port 96 which is shown located beneath the trigger assembly 8. Extending from the lower end of the compressed air channel 93 to the under surface of the flange 19 of the dimpler 10 there is provided a compressed air channel 97. Extending from the lower end of the compressed air channel 93 to the under surface of the flange 43 of the hammer assembly 11 there is provided a compressed air channel 98. Extending through a wall of the housing 3 above the hammer assembly 11 there is provided a compressed air exhaust port 99.
  • a plurality of nails 112 which are removably attached to a relatively stiff, thin plastic or paper ribbon 113, or the like, are inserted in the nail compartment 5 as shown in FIG. 4.
  • a source of compressed air (not shown) is coupled to the apparatus 2 by attaching the source of compressed air to the fitting 9.
  • the compressed air flows through the channel 90 to the valve assembly 12.
  • the valve member 70 With the valve member 70 in the position shown in FIGS. 4 and 5, the compressed air in the channel 90 passes through the valve member 70 and into the compressed air channel 93 as shown by the arrow 111. From the compressed air channel 93, the compressed air is directed through the compressed air channels 97 and 98.
  • the member 71 of the valve member 70 blocks the compressed air channel 91 and the compressed air channel 94.
  • the compressed air in channel 97 which is directed to the underside of the flange member 19 of the dimpler 10, will raise the dimpler 10 until the upper surface of the flange 19 contacts the facing surface of the recess 13, thus retracting the dimpler 10 into the housing 3.
  • the compressed air in the compressed air channel 98 directed to the underside of the flange 43 of the hammer assembly 11 will raise the hammer assembly 11 until the upper surface of the flange 43 contacts the facing surface of the recess 38 in the housing 3.
  • air is exhausted through the port 99.
  • the distances the dimpler 10 and assembly 11 are raised creates a nail receiving space between the lower end of the nailset 42 in the hammer assembly 11 and the interior surface of the wall 15 of the dimpler 10 above the hole 17. Thereafter, one of the nails 112 on the ribbon 113 is automatically positioned beneath the nailset 42 by any suitable automatic feeding mechanism (not shown).
  • the base 7 of the apparatus 2 is placed firmly against a wallboard 111 with the nail located over a stud 114 as shown in FIG. 4.
  • the nail 112 will be oriented perpendicular to the wallboard 110.
  • the trigger member 81 in the valve assembly 12 is depressed.
  • the member 82 pushes against the block 27 and the force of the spring 29.
  • the block 27 pushes against the member 75 extending from the valve member 70, moving the valve member 70 to the left.
  • the valve member 71 opens the compressed air channel 91 to compressed air from the compressed air channel 90.
  • the valve member 72 blocks the compressed air channel 93 from compressed air from the compressed air channel 90 and opens the compressed air channels 94 and 95 to compressed air from the channels 93, 97 and 98.
  • the spring member 63 forces the hammer assembly 11 downwardly, causing the nailset 42 to contact the nail 112 located therebeneath, strip the nail 112 from the ribbon 113 and drive it, at least partially, into the wallboard 110.
  • compressed air located beneath the flange 43 is exhausted through the compressed air channels 98, 93, 94 and 95, as shown by the arrow 115 in FIG. 6.
  • compressed air from the channel 90 is directed through the channel 91, the flexible tubing 92 to the air manifold 54 in the upper end of the hammer assembly 11.
  • the flutter valve member 53 will be driven to its lower position as shown in FIG. 11.
  • the compressed air in the manifold 54 is directed through the compressed air channels 55 and 57 to the lower end of the piston member 51, as shown by the arrows 116, causing the piston member 51 to be driven upwardly, as shown by the arrow 117.
  • the piston member 51 is driven upwardly as shown by the arrow 117, the air in the cavity 50 is exhausted through the compressed air channel 59 in the hammer assembly 11, as shown by the arrow 118, and the compressed air channel 61 in the housing 3.
  • the piston member 51 is driven past the compressed air channel 59, it closes the channel 59 compressing the air between its upper surface and the flutter valve member 53 causing the flutter valve member 53 to be driven to its upper position, as shown in FIG. 12.
  • the end wall 41 of the hammer assembly 11 contacts the interior of the wall 15 of the dimpler 10, driving the dimpler 10 into the wallboard 110 and creating a concave dimple therein.
  • the assembly 11 and nailset 42 sets the nail 112 in the bottom of the dimple.
  • the dimpler 10 is driven downwardly into the wallboard 110 it lowers the member 25 and block 27 relative to the valve assembly 12.
  • the length of the nailset 42 is adjusted such that the base of the head of the nail will be flush with the surface 16 of the dimpler 10. This will prevent the nail from being driven into or through the paper in the bottom of the dimple.
  • both the dimpler 10 and the hammer assembly 11 are raised or retracted into the housing 3 and a nail 112 is inserted below the nailset 42 as described above.
  • the block 27 is raised, the member 27 contacts the underside of the member 82 of the trigger assembly 8 causing the member 82 to pivot about its pivot pin 85 against the spring force of the spring 83, as shown in FIG. 9.
  • a release of the member 81 allows the member 81 to be pivoted by a spring 125 about its pivot pin 84 retracting the member 82 and allowing the spring 83 to return the member 82 to its initial position as shown in FIG. 10 readying the apparatus 2 for another cycle of operation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Portable Nailing Machines And Staplers (AREA)
US06/787,856 1985-10-16 1985-10-16 Impact nailing and dimpling apparatus Expired - Fee Related US4666074A (en)

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US06/787,856 US4666074A (en) 1985-10-16 1985-10-16 Impact nailing and dimpling apparatus
CA000520477A CA1273751A (fr) 1985-10-16 1986-10-15 Dispositif de clouage et chasse-clous a percussion

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US06/787,856 US4666074A (en) 1985-10-16 1985-10-16 Impact nailing and dimpling apparatus

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4775089A (en) * 1987-06-12 1988-10-04 Macdonald Donald K Impact nailing and dimpling apparatus
US4778094A (en) * 1987-10-02 1988-10-18 The Dimpling Nailing Gun Company Nail and dimpler driving apparatus for nailing gun
US5062562A (en) * 1989-07-14 1991-11-05 Senco Products, Inc. Portable power fastening tool
US5320268A (en) * 1993-04-13 1994-06-14 Illinois Tool Works Inc. Powered dimple-forming and fastener-driving tool
US5437339A (en) * 1992-03-18 1995-08-01 Max Co., Ltd. Air-pressure-operated implusion mechanism
US20110232475A1 (en) * 2010-03-24 2011-09-29 Ching-Shun Chang Integrated cylinder and reversing assembly module of a reciprocating pneumatic tool

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1161033A (en) * 1909-07-01 1915-11-23 Saranac Machine Co Automatic carton-machine.
US2442949A (en) * 1945-02-15 1948-06-08 Chicago Pneumatic Tool Co Dimpling and riveting machine
US2918675A (en) * 1958-08-11 1959-12-29 Calwire Dimpling and depth controlling attachment for fastening member driving tools
US3027560A (en) * 1960-07-15 1962-04-03 Spotnails Dimpler mechanism for fastener driving machines
US3040327A (en) * 1959-09-28 1962-06-26 Powers Wire Products Company I Fastener driving and dimpling tool
US3640655A (en) * 1970-02-25 1972-02-08 Mite Corp Apparatus for utilizing hot and cool gas for thrust embedding a metal insert in a body of heat softenable material
US3711008A (en) * 1970-08-31 1973-01-16 P Clifford Impact tools
US3774293A (en) * 1971-09-13 1973-11-27 Signode Corp Fastener driving tool
US4341336A (en) * 1980-05-12 1982-07-27 Smith Gareth J Dimpler attachment and improved fastener driving tool
US4566619A (en) * 1980-07-24 1986-01-28 The Kiesel Co. Pneumatic fastener-driving tool and method
US4610381A (en) * 1984-08-30 1986-09-09 Senco Products, Inc. Drywall tool

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1161033A (en) * 1909-07-01 1915-11-23 Saranac Machine Co Automatic carton-machine.
US2442949A (en) * 1945-02-15 1948-06-08 Chicago Pneumatic Tool Co Dimpling and riveting machine
US2918675A (en) * 1958-08-11 1959-12-29 Calwire Dimpling and depth controlling attachment for fastening member driving tools
US3040327A (en) * 1959-09-28 1962-06-26 Powers Wire Products Company I Fastener driving and dimpling tool
US3027560A (en) * 1960-07-15 1962-04-03 Spotnails Dimpler mechanism for fastener driving machines
US3640655A (en) * 1970-02-25 1972-02-08 Mite Corp Apparatus for utilizing hot and cool gas for thrust embedding a metal insert in a body of heat softenable material
US3711008A (en) * 1970-08-31 1973-01-16 P Clifford Impact tools
US3774293A (en) * 1971-09-13 1973-11-27 Signode Corp Fastener driving tool
US4341336A (en) * 1980-05-12 1982-07-27 Smith Gareth J Dimpler attachment and improved fastener driving tool
US4566619A (en) * 1980-07-24 1986-01-28 The Kiesel Co. Pneumatic fastener-driving tool and method
US4610381A (en) * 1984-08-30 1986-09-09 Senco Products, Inc. Drywall tool

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4775089A (en) * 1987-06-12 1988-10-04 Macdonald Donald K Impact nailing and dimpling apparatus
US4778094A (en) * 1987-10-02 1988-10-18 The Dimpling Nailing Gun Company Nail and dimpler driving apparatus for nailing gun
WO1989002808A1 (fr) * 1987-10-02 1989-04-06 The Dimpling Nailing Gun Company Apparel d'entrainement de clous et rivets pour pistolet cloueur
US5062562A (en) * 1989-07-14 1991-11-05 Senco Products, Inc. Portable power fastening tool
US5437339A (en) * 1992-03-18 1995-08-01 Max Co., Ltd. Air-pressure-operated implusion mechanism
US5320268A (en) * 1993-04-13 1994-06-14 Illinois Tool Works Inc. Powered dimple-forming and fastener-driving tool
US20110232475A1 (en) * 2010-03-24 2011-09-29 Ching-Shun Chang Integrated cylinder and reversing assembly module of a reciprocating pneumatic tool

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